If you have a look at EveMon and add as many skills that use charisma as possible, you will find that it only suggests Presence V at about 24 million skillpoints worth of charisma using skills, or about 483 days worth of training. It seems that this is the case with the other rank 3 learning skills at level 5. It seems a complete waste of time to spend over 2 weeks training a skill which has virtually no practical use.

Decrease the length of rank 3 learning skills time? Or just perhaps demote them to rank 2.

For Presence 5 actually to be useful (Useful being cutting out 1 day and 19 hours) you need to train every leadership skill to 5, and every social skill to 5, culminating in 483 days, 23 hours, 47 minutes, and 57 seconds, with my learning skills already. On a blank account, that would take a much longer time.

After 484 days, who cares about 1 day and 19 hours?! And besides, who is going to spend 484 days training every leadership and social skill?